By Yang HJ   Kim JG   Lim YS   Ryoo E   Hyun SY   Lee G   in The Journal of International Medical Research

ISSN:0300-0605|32|2|118-123

Field House Publishing‎(2004)‎

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By Dong R.L.   Jeoung E.L.   Hyun S.Y.   Roh S.I.   in Fertility and Sterility

ISSN:0015-0282|67|2|315-320

Elsevier‎(1997)‎

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